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[/
Copyright 2010 Neil Groves
Distributed under the Boost Software License, Version 1.0.
(See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
/]
[section:replace_if replace_if]
[heading Prototype]
``
template<class ForwardRange, class UnaryPredicate, class Value>
ForwardRange& replace_if(ForwardRange& rng, UnaryPredicate pred, const Value& with_what);
template<class ForwardRange, class UnaryPredicate, class Value>
const ForwardRange& replace_if(const ForwardRange& rng, UnaryPredicate pred, const Value& with_what);
``
[heading Description]
`replace_if` replaces every element `x` in `rng` for which `pred(x) == true` with `with_what`. Returns a reference to `rng`.
[heading Definition]
Defined in the header file `boost/range/algorithm/replace_if.hpp`
[heading Requirements]
* `ForwardRange` is a model of the __forward_range__ Concept.
* `ForwardRange` is mutable.
* `UnaryPredicate` is a model of the `PredicateConcept`
* `ForwardRange`'s value type is convertible to `UnaryPredicate`'s argument type.
* `Value` is convertible to `ForwardRange`'s value type.
* `Value` is a model of the `AssignableConcept`.
[heading Complexity]
Linear. `replace_if` performs exactly `distance(rng)` applications of `pred`, and at most `distance(rng)` assignments.
[endsect]
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